Control apparatus of internal combustion engine

Abstract

An object of the present invention is to obtain a control apparatus of an internal combustion engine capable of respectively accurately detecting a combustion change in a plurality of combustion modes. In the present invention, the control apparatus of the internal combustion engine operable upon switching the combustion mode sets a detection time and a detection duration to detect a sensor signal of a crank angle sensor 10 in accordance with the combustion mode, and determines whether or not there is the combustion change based on the sensor signal detected by the crank angle sensor 10 at the detection time and for the detection duration set by the control apparatus.

The invention claimed is: 
     
       1. A control apparatus of an internal combustion engine operable upon switching a combustion mode, comprising:
 a detection timing setting means for setting a detection time and a detection duration to detect a sensor signal of a crank angle sensor in accordance with the combustion mode; 
 a combustion change determination means for determining whether or not there is a combustion change based on the sensor signal detected by the crank angle sensor at the detection time and for the detection duration set by the detection timing setting means; and 
 a combustion change suppression control means for controlling to suppress the combustion change of the internal combustion engine in a case where the combustion change determination means determines that there is the combustion change, wherein
 the combustion mode includes compression ignited combustion and spark ignited combustion, 
 the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, shortens the detection duration and advances the detection time in comparison to the spark ignited combustion, 
 the combustion change suppression control means, in a case where determination of the combustion change determination means is altered from the combustion change to non-combustion change as a result of suppression control of the combustion change, maintains a combustion change suppression control state at a time point when the determination is altered, and 
 the combustion change suppression control means controls to suppress the combustion change of the internal combustion engine based on a rotation angle and an angular velocity of a crankshaft obtained from the sensor signal of the crank angle sensor. 
 
 
     
     
       2. A control apparatus of an internal combustion engine operable upon switching a combustion mode, comprising:
 a detection timing setting means for setting a detection time and a detection duration to detect a sensor signal of a crank angle sensor in accordance with the combustion mode; 
 a combustion change determination means for determining whether or not there is a combustion change based on the sensor signal detected by the crank angle sensor at the detection time and for the detection duration set by the detection timing setting means; and 
 a combustion change suppression control means for controlling to suppress the combustion change of the internal combustion engine in a case where the combustion change determination means determines that there is the combustion change, wherein
 the combustion mode includes compression ignited combustion and spark ignited combustion, 
 the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, shortens the detection duration and advances the detection time in comparison to the spark ignited combustion, 
 in a case where the internal combustion engine includes a variable valve mechanism, the combustion change suppression control means alters an activation timing of the variable valve mechanism based on the sensor signal, and 
 the combustion change suppression control means advances a timing to close an exhaust valve of the variable valve mechanism when the combustion mode is the compression ignited combustion, and retards the timing to close the exhaust valve of the variable valve mechanism when the combustion mode is the spark ignited combustion. 
 
 
     
     
       3. A control apparatus of an internal combustion engine operable upon switching a combustion mode, comprising:
 a detection timing setting means for setting a detection time and a detection duration to detect a sensor signal of a crank angle sensor in accordance with the combustion mode; 
 a combustion change determination means for determining whether or not there is a combustion change based on the sensor signal detected by the crank angle sensor at the detection time and for the detection duration set by the detection timing setting means; and 
 a combustion change suppression control means for controlling to suppress the combustion change of the internal combustion engine in a case where the combustion change determination means determines that there is the combustion change, wherein
 the combustion mode includes compression ignited combustion and spark ignited combustion, 
 the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, shortens the detection duration and advances the detection time in comparison to the spark ignited combustion, and 
 in a case where the internal combustion engine includes a fuel injection device, the combustion change suppression control means increases a fuel injection duration of the fuel injection device. 
 
 
     
     
       4. The control apparatus of the internal combustion engine according to  claim 1 , further comprising:
 a variable valve mechanism, a fuel injection device, a supercharger, a power generation motor, or an electric motor capable of generating power and driving, wherein
 based on the sensor signal, an activation timing of the variable valve mechanism, a fuel injection duration of the fuel injection device, a supercharging pressure of the supercharger, a power generation current of the power generation motor, or a power generation current and a drive force of the electric motor is changed. 
 
 
     
     
       5. The control apparatus of the internal combustion engine according to  claim 1 , wherein a failure of the crank angle sensor is judged based on the sensor signal, and in a case of judging the failure of the crank angle sensor, the compression ignited combustion is not performed. 
     
     
       6. The control apparatus of the internal combustion engine according to  claim 1 , wherein the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, sets the detection time and the detection duration to include a peak time of a combustion pressure in a combustion chamber of the internal combustion engine. 
     
     
       7. The control apparatus of the internal combustion engine according to  claim 2 , further comprising:
 a variable valve mechanism, a fuel injection device, a supercharger, a power generation motor, or an electric motor capable of generating power and driving, wherein
 based on the sensor signal, an activation timing of the variable valve mechanism, a fuel injection duration of the fuel injection device, a supercharging pressure of the supercharger, a power generation current of the power generation motor, or a power generation current and a drive force of the electric motor is changed. 
 
 
     
     
       8. The control apparatus of the internal combustion engine according to  claim 2 , wherein a failure of the crank angle sensor is judged based on the sensor signal, and in a case of judging the failure of the crank angle sensor, the compression ignited combustion is not performed. 
     
     
       9. The control apparatus of the internal combustion engine according to  claim 2 , wherein the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, sets the detection time and the detection duration to include a peak time of a combustion pressure in a combustion chamber of the internal combustion engine. 
     
     
       10. The control apparatus of the internal combustion engine according to  claim 3 , further comprising:
 a variable valve mechanism, a fuel injection device, a supercharger, a power generation motor, or an electric motor capable of generating power and driving, wherein
 based on the sensor signal, an activation timing of the variable valve mechanism, a fuel injection duration of the fuel injection device, a supercharging pressure of the supercharger, a power generation current of the power generation motor, or a power generation current and a drive force of the electric motor is changed. 
 
 
     
     
       11. The control apparatus of the internal combustion engine according to  claim 3 , wherein a failure of the crank angle sensor is judged based on the sensor signal, and in a case of judging the failure of the crank angle sensor, the compression ignited combustion is not performed. 
     
     
       12. The control apparatus of the internal combustion engine according to  claim 3 , wherein the detection timing setting means, in a case where the combustion mode is the compression ignited combustion, sets the detection time and the detection duration to include a peak time of a combustion pressure in a combustion chamber of the internal combustion engine.